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A mixing model providing statistics of the conditional scalar dissipation rate
Author(s) -
Meyer D. W.,
Jenny P.
Publication year - 2007
Publication title -
pamm
Language(s) - English
Resource type - Journals
ISSN - 1617-7061
DOI - 10.1002/pamm.200700678
Subject(s) - scalar (mathematics) , reynolds averaged navier–stokes equations , dissipation , probability density function , large eddy simulation , turbulence , statistical physics , schmidt number , mechanics , mixing (physics) , reynolds number , physics , mathematics , statistics , thermodynamics , geometry , quantum mechanics
Joint composition probability density function (PDF) methods are used for the numerical simulation of turbulent reactive flows. Here, other than in classical Reynolds averaged Navier–Stokes (RANS) or large eddy simulation (LES) approaches, the highly non‐linear chemical source term appears in closed form. On the other hand, mixing models are required for the closure of the molecular diffusion term. In the present work, the joint statistics of the scalar and the scalar dissipation rate provided by the parameterized scalar profile (PSP) mixing model are validated. The goal is to combine the PDF method with a flamelet approach, where the scalar dissipation rate plays a crucial role in determining the contribution of the chemical source term. (© 2008 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)